vim-patch:8.2.2848: crash whn calling partial

Problem:    Crash whn calling partial.
Solution:   Check for NULL pointer. (Dominique Pellé, closes vim/vim#8202)

https://github.com/vim/vim/commit/fe8ebdbe5c4e116311c0c0d5937b89ded5c92d01

Co-authored-by: Dominique Pelle <dominique.pelle@gmail.com>

2 files changed, 10 insertions, 8 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 97cf0c6364..87633365b6 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -4175,11 +4175,13 @@ int eval_interp_string(char **arg, typval_T *rettv, bool evaluate)
 char *partial_name(partial_T *pt)
   FUNC_ATTR_PURE
 {
-  if (pt->pt_name != NULL) {
-    return pt->pt_name;
-  }
-  if (pt->pt_func != NULL) {
-    return pt->pt_func->uf_name;
+  if (pt != NULL) {
+    if (pt->pt_name != NULL) {
+      return pt->pt_name;
+    }
+    if (pt->pt_func != NULL) {
+      return pt->pt_func->uf_name;
+    }
   }
   return "";
 }
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index f94725e1cc..99e511a7a4 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -565,8 +565,8 @@ static void f_call(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
     func = (char *)tv_get_string(&argvars[0]);
   }
 
-  if (*func == NUL) {
-    return;             // type error or empty name
+  if (func == NULL || *func == NUL) {
+    return;         // type error, empty name or null function
   }
 
   dict_T *selfdict = NULL;
@@ -1136,7 +1136,7 @@ static void f_ctxsize(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
 }
 
 /// Set the cursor position.
-/// If 'charcol' is true, then use the column number as a character offset.
+/// If "charcol" is true, then use the column number as a character offset.
 /// Otherwise use the column number as a byte offset.
 static void set_cursorpos(typval_T *argvars, typval_T *rettv, bool charcol)
 {